Abstract: Under the background of external wall thermal insulation materials innovation upgrading and coal gangue resource utilization，as industrial solid wastes，sandstone coal gangue and polishing tile waste are used to develop the external wall insulation foam material，which can achieve construction energy-efficient and fire safety，improve the ecological environment of mining area，and reduce the waste of valuable land resources.Based on the introduction of China's status of external wall insulation materials industry and research on coal gangue external wall foam insulation material，the plasticity and foaming of the tested material were analyzed，and the coal gangue exterior wall foam insulation material was prepared.The results show that，coal gangue exterior wall foam insulation material with a certain appearance and property can be produced through the aging，molding，and sintering process，with sandstone coal gangue in Chaoyang City and polished tile waste in Faku County as the main raw material，SiC and MgO as the composite pore forming agent，borax as the fluxing agent.To reduce the costs at an accept range and meet the construction industry requirements，optimization tests on raw material proportioning and sintering system are needed.Therefore，the test technical route is feasible

Key words: Sandstone coal gangue, Polished tile waste, Foam insulation material, Energy-efficient, Plasticized, Foam